However, it should be true. first, why do they want to joke you? it is about the reputation of this university. so don't doubt it. second, make sure you didn't make mistake. sometimes, they mention that if there are some spaces left, you can apply and have the chance to be admitted.
I know someone who was admitted this year by some b-school. He applied all schools in June and received 6 offers. So it is not so late if you are in US or Canada.